For me, no, I only buy the one. More money to spend on getting different characters rather than the same ones, and I like to think leaving one behind means some little kid can pick it up and get the fun out of them.

I'll be taking pics of my Prime collection (so far) and will put them in the Collection Showcase (in case you want to see how it looks). Expect that to be done in a couple of hours.

It does add up (cost wise) rather quickly. Just getting two each of the Megatron/Optimus Prime Powerizers is almost 100 bucks alone. 0_0 I doubt that I will be getting the more expensive FE figures though, since two of each is very expensive.

I've started trying the idea of having a bot mode shelf and vehicle mode shelf. Right now my bot mode shelf is the FE figs (except Whelljack), while the vehicle mode shelf is RID (including Wheeljack). Arcee's bike mode however is the Legion one for obvious reasons and I'm waiting for RID Bulkhead as well.

Mostly for DOTM Cyberverse and select PCC figures because I find them neat to bash around with, they're cheap and affordable, and I dig how cohesive/economical they are for mass display purposes. Other than that, I only get repaints and redecos of the same mold if they're meant to represent different characters (the Seekers, etc.). The only exceptions being Deluxe Barriacade and Starscream since I like the characters so much and enjoy customs of the base mold.